wifi

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#wifi

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Fernan 04/12/2025 09:24 PM

Hello, I need to read the wifi rssi dbm of my esp32

floitsch 04/12/2025 09:26 PM

If you do a scan (https://libs.toit.io/net/wifi/library-summary#scan(3%2C0%2C0%2Cpassive%2Cperiod-per-channel-ms ) you should get AccesPoint (https://libs.toit.io/net/wifi/class-AccessPoint) objects back which have an rssi field

floitsch 04/12/2025 09:28 PM

Example: https://github.com/toitlang/toit/blob/master/examples/wifi/scan.toit

toit/examples/wifi/scan.toit at master · toitlang/toit

Program your microcontrollers in a fast and robust high-level language. - toitlang/toit

Fernan 04/12/2025 09:34 PM

Fernan 04/13/2025 12:16 AM

how do i get the index of an element on a list?

OPFernan

how do i get the index of an element on a list?

floitsch 04/13/2025 08:09 AM

The .do doesn't do that.
So either use a for i := ... loop, or list.size.repeat: | i | ...(edited)

Geoff 02/14/2026 11:07 PM

How can I read the rssi of Jaguar's (or Artemis's?) wifi connection? Scan returns a list, but which SSID is Jaguar connected to? I can wifi.open an ap and get the rssi but that requires ssid AND password. Is there a way to network := jaguar.open.wifi ? Do I have to resort to saving a spare copy of wifi credentials? THANK YOU.

Geoff

How can I read the rssi of Jaguar's (or Artemis's?) wifi connection? Scan returns a list, but which SSID is Jaguar connected to? I can wifi.open an ap and get the rssi but that req...

floitsch 02/14/2026 11:10 PM

Good question. I'm not sure it's possible, but I will have a look tomorrow.
It might also be possible to read the wifi configuration that Jaguar uses

floitsch 02/15/2026 06:18 PM

I think the easiest is to just open a wifi-client without any credentials:

floitsch 02/15/2026 06:18 PM

import net.wifi

main:
  wifi-client := wifi.open null
  print wifi-client.access-point.ssid
  print wifi-client.signal-strength

(edited)

floitsch 02/15/2026 06:18 PM

I haven't looked too deep, but that either reuses an existing connection, or connects with the saved credentials (which is what Jaguar also uses).

floitsch 02/15/2026 06:19 PM

@bitphlipphar

is that the best way?

Geoff 02/15/2026 08:09 PM

Works great! I could never find correct syntax for wifi.open null. RSSI is printing as "1.0" or "0.98461538461538467004" or "0.96923076923076922906". What is that in dB?

floitsch 02/15/2026 08:12 PM

I had to look at the code myself

(not 100% sure it was intended to be used this way).

The value is basically what we get from the esp-idf slightly modified:

/**
  Returns the signal strength of the current access point association
    as a float in the range [0..1].

  Throws an exception if this network isn't currently connected to an
    access point.
  */
  signal-strength -> float:
    info := (client_ as WifiServiceClient).ap-info handle_
    rssi := info[WIFI-SCAN-RSSI_]
    // RSSI is usually in the range [-100..-35].
    rssi = min 65 (max 0 rssi + 100)
    return rssi / 65.0

floitsch 02/15/2026 08:13 PM

If you use the wifi-client.access-point you can get the integer value from there.

Geoff 02/15/2026 08:14 PM

It's perfect! Thank you.

16 messages in total